The followings are correct EXCEPT:
A: T4 and T3 in plasma are reversibly bound to TBG primarily.
B: Only about 0.04% of total T4 and 0.4% of T3 exist in the free form in blood.
C: T4 is the major circulating hormone.
D: T4 is 5 times more potent than T3 and acts faster.
E: About 1/3 of T4 is converted to T3 in peripheral tissues.
A: T4 and T3 in plasma are reversibly bound to TBG primarily.
B: Only about 0.04% of total T4 and 0.4% of T3 exist in the free form in blood.
C: T4 is the major circulating hormone.
D: T4 is 5 times more potent than T3 and acts faster.
E: About 1/3 of T4 is converted to T3 in peripheral tissues.
举一反三
- 血液中甲状腺素与血清蛋白结合，其中 A: 10％为T3，90％为T4 B: 20％为T3，80％为T4 C: 20％为T3，80％为T4 D: 10％为T4，90％为T3
- 关于T3和T4，下列叙述正确的是（） A: T<sub>3</sub>的血浆蛋白结合率高于T<sub>4</sub> B: T<sub>1</sub>起效快，作用强 C: T<sub>1</sub>起效慢，作用持久 D: T<sub>1</sub>起效快，作用持久 E: T<sub>3</sub>起效慢，作用弱
- 总线周期为T1、T2、T3、T4，若要增加等待状态TW，它应插在（）之后。 A: T B: T C: T D: T
- 下列程序段执行后,x的结果是:( )<br/>int<br/>t1=1,t2=2,t3=3,t4=4,x;<br/>x=t2>t3?t1:t4; A: 1 B: 2 C: 3 D: 4
- 下述对于T3和T4代谢的叙述，哪项是不正确的 A: 20%的T<SUB>4</SUB>和B在肝内失活 B: 80%的T<SUB>4</SUB>在外周组织中脱碘 C: 由T<SUB>4</SUB>脱碘变成的T<SUB>3</SUB>，不是体内的T<SUB>3</SUB>的主要来源 D: 绝大部分可由T<SUB>4</SUB>脱碘产生